Occupant crash protection and vehicle seat

Abstract

An occupant crash protection includes: a seatbelt that restrains a front-seat occupant sitting in a front seat; a retractor that is installed inside a seatback of the front seat and reels in one end side of the seatbelt, inserted inside the seatback, so as to allow the seatbelt to be pulled out; and a rear-seat airbag module that is installed inside the seatback, on a seat rear side relative to the seatbelt, and inflates and deploys an airbag toward the seat rear side of the seatback while inflating a part of the airbag toward a seat front side so as to press the seatbelt toward the seat front side.

What is claimed is: 
     
       1. An occupant crash protection comprising:
 a seatbelt that restrains an occupant sitting in a vehicle seat; 
 a retractor that is installed inside a seatback of the vehicle seat and reels in one end side of the seatbelt, inserted inside the seatback, so as to allow the seatbelt to be pulled out; and 
 a rear-seat airbag module that is installed inside the seatback, on a seat rear side relative to the seatbelt, and inflates and deploys an airbag toward the seat rear side of the seatback while inflating a part of the airbag toward a seat front side so as to press the seatbelt toward the seat front side. 
 
     
     
       2. The occupant crash protection according to  claim 1 , further comprising a pressing member that is supported so as to be able to shift in a seat front-rear direction relatively to a frame of the seatback, and that shifts toward the seat front side under an inflation pressure of the part of the airbag and presses the seatbelt toward the seat front side. 
     
     
       3. The occupant crash protection according to  claim 2 , wherein the pressing member is supported so as to be able to turn relatively to the frame. 
     
     
       4. The occupant crash protection according to  claim 2 , wherein:
 the rear-seat airbag module has a module case, and the module case houses the airbag and is mounted on the frame; and 
 the pressing member is mounted on the module case so as to be able to shift relatively to the module case. 
 
     
     
       5. The occupant crash protection according to  claim 1 , wherein:
 the rear-seat airbag module has a module case, and the module case houses the airbag and is mounted on a frame of the seatback; and 
 the module case has an opening through which the part of the inflating and deploying airbag bulges toward the seat front side, and the seatbelt is pressed toward the seat front side by the part. 
 
     
     
       6. The occupant crash protection according to  claim 5 , wherein the rear-seat airbag module has a fabric member that is interposed between an edge of the opening and the airbag. 
     
     
       7. The occupant crash protection according to  claim 2 , further comprising a force limiter mechanism that has an energy absorbing member supported on the frame of the seatback and shifts the energy absorbing member toward the seat rear side of the pressing member as the pressing member shifts toward the seat front side, wherein the energy absorbing member deforms when a restraining load exerted by the seatbelt on the occupant is applied to the energy absorbing member through the pressing member. 
     
     
       8. The occupant crash protection according to  claim 7 , wherein:
 the force limiter mechanism has an urging member that presses the energy absorbing member against the pressing member that has not yet shifted toward the seat front side; and 
 as the pressing member shifts toward the seat front side, the energy absorbing member shifts toward the seat rear side of the pressing member under an urging force of the urging member. 
 
     
     
       9. A vehicle seat comprising:
 a seat main body having a seat cushion and a seatback; and 
 the occupant crash protection according to  claim 1  that has the retractor and the rear-seat airbag module installed inside the seatback. 
 
     
     
       10. The occupant crash protection according to  claim 1 , wherein:
 the seatbelt restrains a front seat occupant sitting in a front seat of the vehicle. 
 
     
     
       11. The occupant crash protection according to  claim 1 , wherein:
 the rear-seat airbag module inflates and deploys the airbag in the event of a frontal collision of the vehicle.